Monthly Archives: April 2020

Download Georeferenced Satellite Images

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SAS.Planet is a free application used to view and download satellite images submitted by such services as Google Maps, Bing Maps, Yandex.maps, Yahoo! Maps and many more.

The satellite images can be downloaded and then loaded into OCAD as georeferenced background maps.

We can recommend the following workaround:

1. Download SAS.Planet from the web and run the application.

2. Zoom to your desired location and select an extend.

3. Open the Selection Manager and edit the tab Stitch. Don’t forget to create a file for georeferencing. We’ve chosen the settings as follows.

4. Start the download.

5. Open a map project in OCAD. Your map needs to be georeferenced. To georeference a new map, you can use the New Map Wizard.

6. Go to Menu Background>Manage>Open.

7. Choose your downloaded satellite images. As they most probably do not have the same coordinate system as your map project, you need to transform the satellite images. Choose Google Mercator as coordinate system.

8. Click OK and the satellite images appear as georeferenced background maps.

Update your Old Maps

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Orienteering maps should been drawn according to the International Specification for Orienteering Maps (ISOM). This ensures that different types of terrain around the world are mapped with the same symbols that every orienteer understands.

These specifications are updated from time to time. For example, the specifications for Forest Maps (ISOM 2017) and Sprint Maps (ISSprOM 2019) have recently been revised. Orienteering maps, which were still drawn with symbols of an old specification, can be easily updated to the current specifications in OCAD.

Sometimes it’s tricky to find out which symbol set is the current one or with which symbol set a map was drawn. The wiki page Symbol Set Overview was created for this purpose.

A demonstration how to update a Sprint Map from ISSOM 2007 to ISSprOM 2019 can be seen here.